Window mounted air conditioner



Dec. 1, 1953 P. R. TIPTON ETAL WINDOW MOUNTED AIR CONDITIONER 1 z a 9 um mm 8 7 3 m. hi I F m 0 a mm 55 Filed May 5, 1951 2 Sheets-Sheet 2 J? fan P. R. TIPTON EFAL WW M, f \r l II |||I|IIIlI I I IIIIIN 3 6 z a 7 8 91 z w i 7 fiww J w 11 I I I WINDOW MOUNTED AIR CONDITIONER Dec. 1, 1953 Filed May 5, 1951 I} n "|l c I:::: I I I I I I I I l I I I I I l l I I I Patented Dec. 1, 1953 UNITED STATES 'ATENT orncs WINDOW MOUNTED AIR CONDITIONER New Jersey Application May 5, 1951, Serial No. 224,781

9 Claims.

This invention relates generally to a window mounted air conditioner, and more particularly to an air conditioner secured adjacent a window with the entire cabinet positioned outside the room to be cooled.

'Heretofore, the window mounted room air conditioner has become increasingly popular and many manufacturers have produced such units. The most common design is one in which the cabinet fits on the window sill with the evaporator side of the cabinet extending into the room and the condenser side protruding on the outside of the window. In order to provide the cabinet with sufficient volume to house the refrigeration system, it has been necessary to construct a cabinet of such a height that it obstructs a considerable portion of the window. This is, of course, objectionable to the occupant since the View and light through the window are decreased. There- 'fore, most home owners will have the unit removed during the winter months, which adds the cost of seasonal removal and replacement to the operational cost of the unit. Other disadvantages of this type of unit are that the window cannot be closed unless the unit is removed and that the operating noise from the unit Will be projected into the room. The present invention provides a window mounted unit which overcomes the above mentioned disadvantages and which offers many advantages as will be disclosed hereinafter.

One object of the invention is to provide an air conditioning unit which is mounted on a Window sill with an air passageway of a minimum height opening into said room so that only a small portion of the window is obstructed by the unit. Another object is to provide an air conditioning unit which is secured to a window sill of a room to be conditioned with the entire unit disposed exteriorly of the room.

Another object is to provide a room air conditioner having the condenser so located that outside air may be conveniently circulated thereover so as to provide excellent cooling thereof.

Another object is to provide a room air conditioner having a cabinet of such size that the refrigeration system and associated parts may be located therein without overcrowding.

Another object is to provide a window mounted air conditioner which may be completely serviced from outside the room being conditioned.

' Another object is to provide a window air conditioner so located that a minimum amount of operating noise from the refrigeration system 2 and air circulating fans will be projected into the room being conditioned.

Another object is to provide a window mounted air conditioner withmeans for eiiectively removing evaporator condensate therefrom with-out the necessity of plumbing equipment.

Another object is to provide means for fastening an outside mounted air conditioner to a window sill in a manner which prevents unauthorized removal or tampering of the unit.

Another object is to provide an air conditioning unit with damper means which may be selectively set to either recirculate room air, or evacuate room air, or circulate fresh air into the room.

Another object is to provide an outside mounted air conditioner cabinet with a hinged lid, which can only be opened from within a room being conditioned, in order to provide access to the interior of the cabinet.

Another object is to provide a window mounted air conditioner unit so positioned in relation to the window that the window may be completely closed without removing any part of the unit.

- Another object is to provide a splitter bar, for dividing the air passageway from the window mounted air conditioner to the room into an air inlet and air outlet, which is pivotally secured to the inner casing of the window so that it can be rotated from operating position to allow complete closing of the window.

Other objects and advantages of the invention will be apparent to those skilled in the art from the following description'of the accompanying drawing in which:

Fig.1 is a perspective view'showing an air conditioner mounted on .a window sill and theou-tside wall of a building.

Fig. 2 is a vertical cross'sectional view of the air conditioner taken along line 2--2 of Fig. 1.

Fig. 3 is a cross sectional View of the top portion of the air conditioner showing the lid thereof partially raised.

Fig. 4 is a cross sectional view of a portion of the air conditioner and. window showing the window in closed position. Fig. 5 is an elevational View of the inner casing of the window showing the splitter bar secured thereto. a I

Fig. 6 is a plan view of the airconditioner taken along line 66 of Fig. 3.

Fig. 7 is a horizontal cross sectional view taken along line 'l'! of Fig. 2.

Referring to the drawings for a more detailed description of the invention, a portion of the wall of a building is shown comprising spaced apart inner wall [8 and outer wall H between which any suitable material may be disposed. A double hung window is provided in the wall comprising outer sill l2, casing l3, inner sill l4, and lower sash [5. Although the present invention is illustrated in connection with this'double hung window, it is to be understood; that itJiStadapted for use in other types of windows such as a metal casement window.

The air conditioner unit which embodies the present invention is illustrated generallyby reference numeral [6 and as seen -imthe' drawing-is enclosed by a rectangular shaped cabinet iflrhaving an elbow or horizontal portiorrti'fli which: fits over the outer window sill I2. A suitable frame [9, shown in part, is provided forstrengthening the cabinet. The bottom wall of elbow portion l8 rests upon a rubber gasket zl and-lag screws 22 secure the wall-.20 and gasket 2! to the sill; l2; in. sealed relationship. Adjusting bolts. 23 are threaded through brackets-.24.- and-are used toiadjust cabinet i'l' to a vertical position. Lag screws. 25- extend through: a central: portion of backwall 26 0f cabinet Handare secured-into outer wall H in: order: to provideadditionalsupport. means; for. thecabinet. Channel members 21.are=secured to the top andside-walls of. elbow portion 18 anda rubber gasket 28 is secured to the channels which; contacts window casing I3 andsaslr I5 whenithe'lower sash is raised, thus providing a seal aroundxtheelbow portion. The top' of the. cabinet I! is provided with a lid. 29 pivotallysecured thereto by hinges 38. so that the lid may be raised as shown in Fig. 3 in order to provide accessto the innerportion of" the cabjnetf.

A.hori'zontal': insulated partition 3! divides the cabinet *I T into; a high. side compartment 32 and a low side compartmentr33. Ther-frontrwa'll- 34 of cabinet H is provided. withan. outlet opening 3'5 inzwhicha screen: 36 is secured. A door: 31 is hingedlyconnected to theLwa-lIL 34 by hinges 38 and is adapted to cover opening" when. in closed-"position. When the air: conditioner is being used, it is contemplated that the door 31 be swung open" approximately 80" and secured by hooks (not sh'ownJ 'or other suitable means. The

backwall 26 of cabinet I? is provided with: an

air inlet'opening 39' 'closedby stationary screen 1 40, and the end walls 41 and" 42 oflthe cabinet are also provided with aininlet openings 43 and 44 and screens 45' and 48, respectively: Secured to cabinet I1 by hinges are doors-41 and 48 which cover openings 43 and 44, respectively, whenin closed position and are adapted to be rotated approximately 80 and secured bysuitable means (not shown) when the air iconditioner'is 'operating. The doors"31 41' and 48 also prevent: rain from entering the compartment 32 when the.

doors-are in open position;

Secured in the condensercompartment 32" adjacent air outlet opening. 35 i's'a condenser 49 which extends across. the width, of the cabinet.

Secured in compartment 32. isanelectric motor 58 having a shaft 51 on. which a propeller type fan 52: is mounted. Enclosing. the fant52 is a shroud 53 which tapers outwardly and fits overthe edges of; condenser 49 so that when the motor is running anddoors 3 Hand 48 are open; the fan.willzdrawsoutside air through inlet openings 35, 43 and 44 and force it over: the tubesurfaces ofithe condenser. Located adjacent. opening 44 isa motor-compressorunit 54 which will also: he

lapped by wall 58 in air sealing relationship.

Wall 58 is secured to vertical plates 59 which are mounted on thedown-turned ends 96 of lid 29. Hooks. 68 are pivotally connected to brackets 6| whichare mounted on the wall 58. Fastened to i end walls-of cabinet I! are pins 62 which are engaged byziho'oks in order to lock the lid 29 in closed position. A filter element 63 is positioned across inlet passageway 55 so that air passing therethrough will be filtered. An evaporator 64 is disposed in outlet passageway 56 in a slightly inclinedpositionsothat-any watencondens-ingtrom the. onto theevaporator. will drain down. and drip-from'theglower edge of the evaporator .onto the partition 3|. The top. surface. of.partition3l slopes toward a center openingthrough which. a tube 55- ex-tendsand terminates adjacent thecondenser fan. 52. The water will. flow by gravity through tube 65: and W111i then. be. picked up. by condenser fan. 52. andsprayed in. the form of: a fine mist over the hot surface ofv the condenser 49 where. it will. be vaporized. and then: passed tothe outside air.

A blower 68 is secured. in.- outlet passageway 56 adjacent the end wall. 42.-with a driving-motor 61 mountedv onlthe exterior surface. of the end. wall. in the illustration the. motor is mounted. on the outside of the cabinet-foreasy cooling thereofand to provide. additional. space within. the cabinet, but the motor. could. be mounted within the cabinet if desired. The blowerfiflcomprises. a casing 51- having an inletopen-ing. 68 and anoutlet open.- ingv 89,. and a circular rotor Ill. hay-ingblades mounted. thereon whichwill be. rotated by motor 91. Extendingfrom: casing 61: to end wall-4t is. a fan wall H havingyasemiecircular. portion which fits around the top. portion of inlet opening. 68. Theedges of the fan wall 1| fitagainst adjacent parts. in sealed relationship so. that all the air comingup through. the evaporator will be drawn through fan inlet 88. and expelled by-blower 65 through fan outlet 69.

The refrigeration: system is charged with a suitable refrigerant and operates in a normal mannerp Afterthe. refrigerant is compressed by .-the..motor-compressor unit 54:,- it. is forwarded through. tube 12 into condenser:49= where it. is cooled and then passed through capillary tube-13 into evapor-ator.64; Afterpassing. through ..the evaporatonythe. refrigerant is returned tormotore compressor unit 5.4 through suction tube 1.4-: to repeat the cycle. Electrical-controls for the 1110* tor-compressor 5.4,. fan. motor .58. and blowermotorrfil arenot shown: but it. is contemplated that they bewmounted on the inside. window casing where access thereto by an operator: is conveniently available.

Pivotally secured to pins i5and 1.6; which. are mounted'in. window casing I3, is..a:splitter2ban;11 comprising a :curved; body portion. l8 andr-end portions; 7.9: and. 88;. Therrende portions: aresprovided: with. slots 8-! and. 825. whiclr engagei: pins 15 and respectively, and each end portion; has a downwardly-extending. sectionto which louvers 83 are: secured. When the-window is opem the splitter bar is in-normal positionias shown-in Fig. 2 with shoulders 84 provided in the end portions for engaging window frame I5 and positioning the frame correctly with the outlet passageway 5B. When the window is to be closed, splitter barl'i is rotated to the closed position shown in Fig. 4 so that the window frame l5 has a free sliding path. It is contemplated that a motor shut olT switch (not shown) be provided which will be depressed by the splitter bar when in normal position but which will be disengaged when spitter bar is in closed position. When so disengaged, the switch will break the circuit to the electric motors to prevent operation of the machinery when the window is closed.

'Pivotally secured to the lid 29 by hinges 83"is an evacuation damper 84 having a fixed lever 85 projecting downwardly therefrom to which a rod 86 is pivotally connected. The other end of rod 86 is pivotally connected to cold air damper 8! which extends across the width of passageway 55 and is pivotally secured to dividing wall 58. Fixed to damper 81 is a lever 83 which extends into inlet passageway 55 and may be grasped by an operator by swinging splitter bar 11 out of the way and reaching into the inlet passageway. The linkage between the dampers is such that when damper 81 is opened, evacuation damper 84 will be closed, and when damper 8'! is closed, evacuation damper 84 will be opened.

On the back wall 26 of the cabinet an opening 89 is provided in which a fixed screen 90 is :secured. A fresh air damper 9| is hinged to the cabinet by hinges 92 and is adapted to close the opening 89 when in the position as shown by solid lines in Fig. 2. The damper 9| extends the full width of inlet passageway 55 and is provided with a handle 93 which may be grasped and pulled upwardly to rotate the damper to the position shown by dotted lines in Fig. 2. With the damper in this position, the blower 66 will pull fresh air through opening 89 and circulate it into the room. Any suitable means may be provided for holding damper 9! in any desired position in order to mix returning room air with outside air. An air conditioning unit constructed in the manner explained heretofore can be completely assembled before being shipped to a home and can be easily mounted in a window. In mounting the unit, gasket 2! is first laid on window sill l2 and the unit is lifted in place so as to rest on the gasket. After bolts 23 have been adjusted to bring the cabinet plumb, lag screws 25 are screwed into the building wall tight enough to hold the cabinet with gasket 2| making leakproof contact with window sill l2. Lag screws 22 are then screwed through bottom 20 of elbow section 58 and gasket 2| into window sill IZto complete the mounting of the cabinet. Pins ="l5 and 16 are next secured in window casing, 13 and splitter bar 11 is secured thereto so that it is free to be rotated in the manner explained heretofore. After the unit l6 and splitter bar 1! are installed, proper electrical connections are made and the unit is ready for operation. For normal cooling of the room, window sash I5 is raised so that shoulder 84 of the splitter bar engages the sash, doors 31, 4'! and 48 are opened, cold air damper 81 is rotated to open position with evacuation damper 84 in closed positionfa'nd fresh air damper 9! is swung downwardly to close opening 89. The machinery will be automatically controlled by suitable controls, and with the machinery operating, air from the lower portion of the room reached in order to close will be drawn through louvers 83 by blower 66 and circulated through filter 63 and evaporator 64. As the air is discharged from the blower 66 it will travel over splitter bar Ti and be directed by the curved surface 18 into the upper portion of the room from where it will drop downwardly across the entire room. Condenser fan 52 will circulate Outside air through inlet openings 39, 43 and 44 over both the condenser 49 and motor-compressor unit 54 with effective cooling of both. Any water which collects on evaporator 64 will drip therefrom onto partition 3! and be drained into the air stream of fan 52 through drain tube 65. The air within the room will be cooled to a predetermined temperature and good air circulation therein will result from the manner in which the splitter bar directs the air entering and leaving the air conditioning unit.

If the air within the room is to be evacuated. splitter bar ll is rotated to'allow entrance into inlet passageway 55 so that lever 88 may be cold air damper 87 with the resultant opening of evacuation damper 84 by connecting rod 86. The controls are now set to operate only blower 66 and the air from the room will be discharged through damper 84.

By fully opening cold air damper 8'7 and partially opening fresh air damper 9|, the air being cooled by evaporator 64 will be a mixture of return room air and fresh air from outside. If fresh air damper 9| is completely opened, it closes inlet passageway 55 and only fresh air will then be cirulated into the room to effect a supercharging thereof. With a damper arrangement as provided in this invention, the condition of the room air can be easily controlled.

Filter 63 can be conveniently changed through inlet passageway 55 or by raising lid 29. As seen in Fig. 3 of the drawings, wall 58 is raised with lid 29 so that access is furnished into the interior of the cabinet. Dividing wall 57 and fan wall ll may be detachably secured to the cabinet so that they can be quickly removed if servicing of the evaporator 64 is required. Servicing of the members in condenser compartment 32 may be performed through openings 35, 43 and 44. r i

As will be apparent from the preceding description, a compact air conditioning unit is provided which contains many novel features and advantages. While the invention has been shown in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications without departing from the spirit thereof. Therefore, it is desired that only such limitations be placed thereon as are specifically set forth in the appended claims.

What is claimed is:

1. The combination of an air conditioningrunit comprising a cabinet positioned outside a building adjacent a window which opens into a room; said cabinet provided with a duct which projects into said window and terminates adjacent a sash so that the sash can be opened and closed; means for drawing room air through said duct into said cabinet, cooling the air therein and returning it to the room through said openings; and a splitter bar which directs warm air from the lower portion of the room into the duct and cold air from the duct into the upper portion of the room.

2. The combination of an air conditioning unit comprising a cabinet positioned outside a building adjacent a window which opens into a room; said cabinet projecting into said window and terminatingadjacent a sashof saidwindow. so that said. sash may be opened and: closed; an openin provided. in. said cabinet. which communicates with saidroom when the sash is opened; means for drawing room airthrough said opening into said-cabinet, cooling the air thereinand return,- ing it through said opening to the" room and a splitter bar pivotally secured within .said. room which cooperates with said opening when the window is open to direct airentering said' opening from one portion of the room and air leaving said opening-to another portion of the room; saidsplitter bar adapted to be rotated-away from said opening whenthe window is closed.

3. .The combination of an air conditioning unit 7 comprising a cabinet which projectsinto a windowof .a room; an opening. provided in said cabinet which communicates .withsaid room; means for drawing room-.a-ir through. saidopening into saidcabinet, cooling the air. therein and. returning it through said openingtothe room; a splitter -bar. positioned across said window having. a curvediront portion,..=.vh-ich directs air leaving said opening toward the ceiling of said-room, and louvers which direct air from the floor of said room into said opening,

4. The. combination of an air conditioning unit comprising. a cabinet positioned outside a room window. and having a portion whichproj-ects into saidwindow and terminates adjacent a window sash so that said sash can be opened and closed; an opening providedin said portion-Which communicates with saidzroom when the sash is open; means. for drawing. room air through. said opening into said. cabinet, cooling .theair returning it through said opening. to the room; and a splitter bar disposed across said opening and pivotally secured toisaid window;- said splitter bar having a curved front portion; which directs air dischargingi-rom said openingtowardthe ceiling which. direct air. from of said room,.and louvers thezfioor of said room into said opening said split.- ter havingmeans for holding the sashopen when in operatingposition and which :is adapted tobe rotated-from operating position in order to close said sash.

5. An air conditioning unit. comprising a. cabinet positioned outside a room. adjacent a window; saidcabinetprovided with an elbowportionwhich projects into. said window and terminates adjacent a window. sasnina manner to. allow openingand closing of. the sash; aninletpassageway and..outlet passageway. provided through. said elbow portionandcabinetg. a. cooling-element disposed within said-.cabinetover which room-,air is circulated byway of said passageways; an evacuation. damper which is. adaptedto opennand close an opening provided in said cabinet-between the outlet passageway and the outside. atmosphere; a cold airv damper. which. is .positionedbetween said evacuation damper and said .room and is adapted to open and close. said outlet passageway; and a linkage between said dampers whichwill close one damper when the other damperis opened.

6. 'An air conditioning unitcomprising a cabinet positioned outside .a. room adjacent. a window;

therein and said cabinet. provided with an elbow portion which. projects into .said'. window and terminates adjacent a window sash in. a manner to..allow opening-wand closing of the sash; an inlet pas, sageway and an outlet passagewayprovided through said elbow portion and cabinet; a cool.- ing.-element disposed within said cabinet over whichroom air is circulated by way of said passageways; an opening provided in said inlet passageway which communicates with outside air; and a damper for controlling the amount clientside air flowing through said opening.

7. An air conditioning unit comprising a-cabinet positioned outside a room adjacenta window; said cabinet provided with an elbow portion which projects into said window and terminates adjacent a window sashin such a manner to allow opening and closing of the sash; an. inlet passageway and outlet passageway provided through said cabinet: and elbow portion; acooling element .disposedwithin said outlet passageway. and fan means for circulating room air over the cooling element by way of said. passageways; an evacuation damper which is adapted to open and close an opening provided in said cabinetbetween the outlet passageway and outside air; a cold air damper which is adapted to openand close said outlet passageway; and. a fresh. air damper which is adapted to open and close. an opening between said inlet passageway andv outside air.

8. An air conditioning unit, comprising: a cabinet having means for securing it toan exterior wall surface of a room;,saidcabinetbeing adapt- .edto project into a room window and terminate adjacent a sash of the window so. that the. sash may be opened and closed; said cabinet having an opening therein which is arranged to commu-r nicate with the roomwhen thesash is open; an insulated partition which divides saidcabinet into a high side. compartment anda low side compartment; said low side compartment having a refrigerant evaporator disposed therein; and air circulating means, including a splitter bar pivotally secured within the room for directing warm air from. the, lower portion of the room throughsaid cabinet room opening, over said evaporator for cooling, and back through said opening to the upper portion of the room.

9. The combination described in claim 8. and further characterized by having a fresh air damper in said low side compartment for admit.- ting outside air thereinto, and an evacuation damper in said low side compartment forv dis.-' charging room air outside the. room.

PHILLIP R. TIP'ION. WILLIAM F. BORGERD.

ReferencesCited' in the file of this patent UNITED STATES. PATENTSv Number-. Name Date" 2,268,451 Hull Dec. 30; 1941 2,283,928 Huggins May26; 1942 2,333,374 Guthrie"- Nov. 2', I943 2,480;5l0 Roper' Aug. 30', 1949 

